<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script type='module'>
        let obj = {
            name : '张三'
        };

        let newObj = new Proxy(obj, {
            get(target, key){
                console.log('get');
                return target[key];
            },
            set(target, key, newValue){
                console.log('set');
                target[key] = newValue;
                // 严格模式下
                return Reflect.set(target, key, newValue);
            },
            // 判断key值是否存在于对象中
            has(target, key){
                console.log('has');
                return key in target;
            }

        });

        newObj[name];

        newObj.name = '里斯';

        console.log('name' in newObj);
    </script>
</body>
</html>